Finding the Fourth Proportional to 66,505.62, 91,789.17 and 63,516.18

Step by Step Solution

1. Step 1: Write the proportion equation
   66,505.62 : 91,789.17 = 63,516.18 : x
2. Step 2: Convert to fraction form
   66,505.62/91,789.17 = 63,516.18/x
3. Step 3: Cross multiply
   66,505.62x = 91,789.17 × 63,516.18
4. Step 4: Simplify right side
   66,505.62x = 5,830,097,443.77
5. Step 5: Solve for x
   x = 5,830,097,443.77/66,505.62
6. Step 6: Final answer
   x = 87,663.23